As someone who is a graphic designer for quite some time (finishing at the VERY top of my entire school, getting gigs to work with the top people) I can tell you one thing.. Pick a logo that YOU LIKE the most. As long as the logo is not pixelated, doesn't break any major rules, good color contrast, works with just black/white but also with a color, then you are 100% DONE!
Bottom line is no one will go to a restaurant and say, "You know what? This logo only has 3 colors, not 4 as I like.. That is it! WE ARE LEAVING THIS PLACE!" or "What kind of social media company are you with 8 pentone colors? You know how much it'll cost to print" - no one cares. your logo only works for you once IT becomes famous.
At that point you ask your self, "Do I really care about my logo, or the fact that I'm banking"